Any know of decent quality ones or a schematic for one? Dacs are easy enough (lots of great designs out there), but ADs aren't quite so easy to come across.
any help appreciated as always.
stew
any help appreciated as always.
stew
Here a link to the TI eval kit
http://focus.ti.com/docs/toolsw/folders/print/pcm4222evm.html
Anyone have any suggestions for a kit with more polish to it. I've seen a chinese item on ebay that uses a CS5340. Not as nice as the 4222 specwise though. The CS5341 could probably be substituted from some improvement. Anything that uses a CS5381 out there?
I've seen lots of discussion on DAC's, but not much on ADC's. I'm looking for something I can use to copy my LP's for the day's when I'm too lazy to flip vinyl.
http://focus.ti.com/docs/toolsw/folders/print/pcm4222evm.html
Anyone have any suggestions for a kit with more polish to it. I've seen a chinese item on ebay that uses a CS5340. Not as nice as the 4222 specwise though. The CS5341 could probably be substituted from some improvement. Anything that uses a CS5381 out there?
I've seen lots of discussion on DAC's, but not much on ADC's. I'm looking for something I can use to copy my LP's for the day's when I'm too lazy to flip vinyl.
i dont know any of those cirrus chips , but they might have switched cap filters inside i would avoid that fact 😀
PCM4222 ev kit:
"Each analog input is buffered by an input circuit employing the OPA1632 fully differential audio amplifier. "
there is some adc discussion on prodigy-pro forums, someone there said this opa1632 has its roots in ADSL world and its blazing.
PCM4222 ev kit:
"Each analog input is buffered by an input circuit employing the OPA1632 fully differential audio amplifier. "
there is some adc discussion on prodigy-pro forums, someone there said this opa1632 has its roots in ADSL world and its blazing.
BTW I would be happy that the kit costs only 150Usd , and polish some some stereo 4x10 Led bargraph addition to it , made out of HDSP 4840 for example
fishzug - you are absolutely correct. The PCM4222 is very nice and the eval board is a fantastic deal. I have no idea what I'm talking about. I'll be quiet now. 🙂
I believe the a few Lynx sound cards also use the PCM4222 (Lynx L22?).
I believe the a few Lynx sound cards also use the PCM4222 (Lynx L22?).
this chip is some 1 year old at most afaik . BTW the very first (discrete) D-S audio ADC described by Robert W. Adams and presented in 1985's AES ( I have the paper , pm ) also used 6 bit modulator front end. Oh I also have some 40 segment fully built Ledmeters with calibration and schematic descripture for sale if someone wants some 😀
eval boards and such...
well I've got 4 BB pcm 64's I've been saving and most ADCs use a comparator and a DAC internally, so I think I may be able to put something together----or look for the Beringer piece and Hot rod it. Wish A.R.T. still sold the DIO....
well I've got 4 BB pcm 64's I've been saving and most ADCs use a comparator and a DAC internally, so I think I may be able to put something together----or look for the Beringer piece and Hot rod it. Wish A.R.T. still sold the DIO....
DSD A/D converter
Hi there,
I am considering building (as part of a collaboration I hope) a DSD A/D converter but cannot find a technical description of the SACD format. I have made searches on the internet for the SACD Scarlet Book but don't seem to find anything specific about how the A/D conversion process is designed. Any suggestions as to where I can find this?
Thank you ;-)
Jesper
Hi there,
I am considering building (as part of a collaboration I hope) a DSD A/D converter but cannot find a technical description of the SACD format. I have made searches on the internet for the SACD Scarlet Book but don't seem to find anything specific about how the A/D conversion process is designed. Any suggestions as to where I can find this?
Thank you ;-)
Jesper
DSD A/D converter information found
Oouups, just as I posted my question here (post 13), I found some more information. So I've got information for some time now... No need to reply to post 13.
Thanks.
Jesper
Oouups, just as I posted my question here (post 13), I found some more information. So I've got information for some time now... No need to reply to post 13.
Thanks.
Jesper
Re: DSD A/D converter information found
care to share your findings? a link perhaps?
gentlevoice said:
care to share your findings? a link perhaps?
Bruno's AES paper is online somewhere... I don have link.. I think i found it by searcghing for "DSD powerdac" 😉
To Pulse/R....
Yes, I'd be pleased to share my findings/links.
... At Uwe Beis's webpages (see earlier post in this thread), there's a description of how Delta Sigma converters, and modulators work ...
Anything particular you are interested in?
Happy New Year!
Jesper
Yes, I'd be pleased to share my findings/links.
... At Uwe Beis's webpages (see earlier post in this thread), there's a description of how Delta Sigma converters, and modulators work ...
Anything particular you are interested in?
Happy New Year!
Jesper
im in helpful mood today:
http://www.grimmaudio.com/whitepapers/discrete ad converter.pdf
also look for Hawksford's findings.
Happy & succesful new year , hope all us diyers can harvest the fruits of labor real soon
http://www.grimmaudio.com/whitepapers/discrete ad converter.pdf
also look for Hawksford's findings.
Happy & succesful new year , hope all us diyers can harvest the fruits of labor real soon
DSD A/D converter - practical DIY designs?
Hi,
Anybody knows of practical DSD diy A/D converter designs? I.e. only a delta-sigma 1-bit modulator with DSD output as well.
Like e.g.:
http://www.beis.de/Elektronik/DeltaSigma/DeltaSigma.html -- see figure 6.
Preferably more than 2 channels but 2 channels will do... And preferably 128*oversampling (5,6 MHz sampling frequency).
Has it been done for DIY...?
Best regards,
Jesper
:xeye
Hi,
Anybody knows of practical DSD diy A/D converter designs? I.e. only a delta-sigma 1-bit modulator with DSD output as well.
Like e.g.:
http://www.beis.de/Elektronik/DeltaSigma/DeltaSigma.html -- see figure 6.
Preferably more than 2 channels but 2 channels will do... And preferably 128*oversampling (5,6 MHz sampling frequency).
Has it been done for DIY...?
Best regards,
Jesper
:xeye
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